Hhmm.... the basic niggels have been covered... I'm kinda surprised that nothing works. Never had that problem myself. Have you had a word with support at Easypano??
If I only had an hour to chop down a tree... I'd spend 45 mins sharpening the axe.

Created a three scene virtual tour in Tourweaver, published (without the preview) saved and exited. No encryption, file names about 12 characters long, no non-english characters.
Started Internet Explorer (v6) opened saved tour page and got the error "Loading Java Appled Failed ...". The IE window shows a black screen with grey coloured window with a red 'X' in the top left corner.